openwrt

OpenWrt镜像：https://archive.openwrt.org/releases/22.03.2/targets/bcm27xx/...
OpenWrt工具链：https://archive.openwrt.org/releases/22.03.2/targets/bcm27xx/...
版本：22.03.2

装置

At the PC:#unzip the Image

gzip -d openwrt-21.02.0-bcm27xx-bcm2708-rpi-squashfs-factory.img.gz# insert SD-card and check the name, alternatively check dmesglsblk# copy the Image 1:1 to the SD-cardsudo dd if=openwrt-21.02.0-bcm27xx-bcm2708-rpi-squashfs-factory.img of=/dev/mmcblk0 bs=1M conv=fsync

扩大文件系统

SSH INTO THE RASPBERRY PI:

opkg install kmod-usb-storage kmod-usb-ohci kmod-usb-uhci e2fsprogs fdisk resize2fsfdisk /dev/mmcblk0(also see the less finicky way by @SemperEnim below):To make it clear what I entered, here the complete session of fdisk. Please note how the first sector remains unaltered:Welcome to fdisk (util-linux 2.36.1).Changes will remain in memory only, until you decide to write them.Be careful before using the write command.Command (m for help): pDisk /dev/mmcblk0: 14.99 GiB, 16096690176 bytes, 31438848 sectorsUnits: sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisklabel type: dosDisk identifier: 0x5452574fDevice         Boot  Start    End Sectors  Size Id Type/dev/mmcblk0p1 *      8192 139263  131072   64M  c W95 FAT32 (LBA)/dev/mmcblk0p2      147456 360447  212992  104M 83 LinuxCommand (m for help): dPartition number (1,2, default 2): 2Partition 2 has been deleted.Command (m for help): nPartition type   p   primary (1 primary, 0 extended, 3 free)   e   extended (container for logical partitions)Select (default p): pPartition number (2-4, default 2): 2First sector (2048-31438847, default 2048): 147456Last sector, +/-sectors or +/-size{K,M,G,T,P} (147456-31438847, default 31438847): Created a new partition 2 of type 'Linux' and of size 14.9 GiB.Partition #2 contains a squashfs signature.Do you want to remove the signature? [Y]es/[N]o: nCommand (m for help): pDisk /dev/mmcblk0: 14.99 GiB, 16096690176 bytes, 31438848 sectorsUnits: sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisklabel type: dosDisk identifier: 0x5452574fDevice         Boot  Start      End  Sectors  Size Id Type/dev/mmcblk0p1 *      8192   139263   131072   64M  c W95 FAT32 (LBA)/dev/mmcblk0p2      147456 31438847 31291392 14.9G 83 LinuxCommand (m for help): wThe partition table has been altered.Syncing disks.

REBOOT AND LOG IN AGAIN
The device usage and sizes are now as follows (my SD-card is 16 GB in size). The size needs still needs to be adjusted:

df -hFilesystem                Size      Used Available Use% Mounted on/dev/root                 4.3M      4.3M         0 100% /romtmpfs                   217.9M     52.0K    217.9M   0% /tmp/dev/loop0               92.7M      2.6M     83.1M   3% /overlayoverlayfs:/overlay       92.7M      2.6M     83.1M   3% //dev/mmcblk0p1           63.9M     17.3M     46.6M  27% /boottmpfs                   512.0K         0    512.0K   0% /dev

Actually this was easier than expected, simply use resize2fs:

opkg update && opkg install resize2fsresize2fs /dev/loop0resize2fs 1.45.6 (20-Mar-2020)Filesystem at /dev/loop0 is mounted on /overlay; on-line resizing requiredold_desc_blocks = 1, new_desc_blocks = 120The filesystem on /dev/loop0 is now 15641408 (1k) blocks long.

AND NOW DF -H RETURNS THE ADJUSTED SIZE:

df -hFilesystem                Size      Used Available Use% Mounted on/dev/root                 4.3M      4.3M         0 100% /romtmpfs                   217.9M     56.0K    217.9M   0% /tmp/dev/loop0               14.5G      3.1M     13.9G   0% /overlayoverlayfs:/overlay       14.5G      3.1M     13.9G   0% //dev/mmcblk0p1           63.9M     17.3M     46.6M  27% /boottmpfs                   512.0K         0    512.0K   0% /dev

WX：上海晶珩电子 原文：在 Raspberry Pi 4上装置 openwrt